Zirc Microban® 12HI Sugical Bur Guard is designed to hold longer surgical burs and drills up to 37mm long. Snap-on clip included retains two shorter burs. Holds 12 GF or RA burs. Made of friction-activated Microban, an EPA registered antimicrobial plastic additive that helps control surface bacteria, mold and fungi continuously up to five years. Steam and chemical autoclavable up to 275°F. Available in blue, coral, green, mauve, teal, white and yellow.